@incollection{AST_2008__321__1_0,
     author = {Simons, James and Sullivan, Dennis},
     title = {Structured bundles define differential $K$-theory},
     booktitle = {G\'eom\'etrie diff\'erentielle, physique math\'ematique, math\'ematiques et soci\'et\'e (I) : Volume en l'honneur de Jean Pierre Bourguignon},
     editor = {Hijazi Oussama},
     series = {Ast\'erisque},
     pages = {1--3},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {321},
     year = {2008},
     mrnumber = {2521641},
     zbl = {1204.57021},
     language = {en},
     url = {http://www.numdam.org/item/AST_2008__321__1_0/}
}